Ultra-short wavelength of 1.7 μ m ultrafast Tm-doped fiber laser
Ultra-short wavelength of 1.7 μ m ultrafast Tm-doped fiber laser
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DOI：
10.1063/5.0173713
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发表时间：
2023-12
影响因子：
4
通讯作者：
Xusheng Xiao;Lu Li;Weiqiang Wang;ZhiYong Chen;Peiguang Yan;Haitao Guo
中科院分区：
文献类型：
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作者：
Xusheng Xiao;Lu Li;Weiqiang Wang;ZhiYong Chen;Peiguang Yan;Haitao Guo
工作波长为 1.7 μm 的掺铥光纤激光器 (TDFL) 在多光子显微镜和成像应用中具有巨大潜力。然而，还需要进一步的研究和开发，特别是在 1720 nm 以下的超短波长范围内。在此，我们利用微纤维 InSb 可饱和吸收器演示了 1.7 μm 的锁模 TDFL。通过采用腔内滤波器、优化增益光纤长度并结合宽带倏逝场吸收器，我们在 TDFL 中实现了高性能超短波长孤子。孤子的中心波长为1707 nm，脉冲宽度为895 fs，重复率为23.36 MHz，单脉冲能量为1.7 nJ。此外，我们的实验证明了不同孤子态的生成，包括高阶谐波和束缚孤子。我们还通过实验研究探索锁模的动力学。我们的研究结果为多种1.7μm锁模工作状态的研究和控制奠定了坚实的基础，推动了该波段超快光纤激光器领域的发展。
Thulium-doped fiber lasers (TDFLs) operating at 1.7 μm have immense potential for multiphoton microscopy and imaging applications. However, further research and development are needed, particularly in the ultra-short wavelength range below 1720 nm. Herein, we demonstrate the mode-locked TDFL at 1.7 μm, utilizing a microfiber InSb saturable absorber. By employing intracavity filters, optimizing the gain fiber length, and incorporating a broadband evanescent field absorber, we achieve high-performance ultra-short wavelength solitons in the TDFL. The solitons exhibit a central wavelength of 1707 nm, a pulse width of 895 fs, a repetition rate of 23.36 MHz, and a single pulse energy of 1.7 nJ. Moreover, our experiments demonstrate the generation of diverse soliton states, including high-order harmonic and bound solitons. We also explore the dynamics of mode-locking through experimental investigations. Our findings establish a solid foundation for the research and control of diverse 1.7 μm mode-locked operation state, advancing the field of ultrafast fiber lasers in this wavelength band.